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Search: id:A091072
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| A091072 |
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Numbers a(n) such that odd part of a(n) is of form 4k+1. The bit to the left of least significant bit of a(n) is unset. |
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+0
9
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| 1, 2, 4, 5, 8, 9, 10, 13, 16, 17, 18, 20, 21, 25, 26, 29, 32, 33, 34, 36, 37, 40, 41, 42, 45, 49, 50, 52, 53, 57, 58, 61, 64, 65, 66, 68, 69, 72, 73, 74, 77, 80, 81, 82, 84, 85, 89, 90, 93, 97, 98, 100, 101, 104, 105, 106, 109, 113, 114, 116, 117, 121, 122, 125, 128, 129
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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Either of form 2a(m) or 4k+1, k>=0, 0<m<n.
A000265(a(n)) is an element of A016813.
a(n) such that A038189(a(n)) = 0.
Numbers n such that kronecker(n,m)=kronecker(m,n) for all m. - Michael Somos Sep 24 2005
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PROGRAM
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(PARI) for(n=1, 200, if(((n/2^valuation(n, 2)-1)/2)%2==0, print1(n", ")))
(PARI) {a(n)= local(m, c); if(n<1, 0, c=1; m=1; while( c<n, m++; if( ((m/2^valuation(m, 2)-1)/2)%2==0, c++)); m)} /* Michael Somos Sep 24 2005 */
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CROSSREFS
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Complement of A091067.
First differences are in A088742.
Sequence in context: A045704 A084581 A121996 this_sequence A001481 A034026 A125022
Adjacent sequences: A091069 A091070 A091071 this_sequence A091073 A091074 A091075
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KEYWORD
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nonn,easy
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AUTHOR
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Ralf Stephan (ralf(AT)ark.in-berlin.de), Feb 22 2004
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